I will tell you how that practice might help for SEO purpose. A page has a limited link juice which gets distributed more or less equally to all links on the pa

I will tell you how that practice might help for SEO purpose. A page has a limited link juice which gets distributed more or less equally to all links on the page. So if the article links to external page, some of that link juice flows to it. Why not rather limit it to your own internal pages?